Since most of my sales come from non internet sales and zero from social media I do not spend time in sales mode on the net.I do get email contacts that turn into orders so I check e-mail a few times every day as well.
I tend to check this board every day a few times (before studio time or at much or evenings) to see if any info I have in my knowledge base have may help others.
I keep all electronic devices (my iPad to phone or computer or laptop ) out of clay studio. I would kill it to quickly with liquid and dust.
My thoughts are work in studio -work in studio or work in studio.
ANY SPARE TIME I SUGGEST WORKING IN STUDIO when you are starting out.
Along with a heavy dose of working in studio-which for me ends with a line of production work that turns into money.
The work in studio is not working on the net ,its making work to sell.This requires many steps and lots of time .I do think the persons these days starting out should use the net tools to get traction (noticed) but do not get caught up in spending much time at this as making quality work is way more important that say a blog.
Time management is a key to making the studio work out in terms of a living. As a production potter one learns to spend ones tine wisely .
for me sales are based on my brand name (studio name) and years at work turning out quality products and dealing with people directly not the the net via e-mail.
Sure after 40 years I get orders from returning customers via the net but its a small potatoes deal compared to all the real income sources for me which are not net related .
If you are a hobbist than spending time at whatever really does not matter including social media-but as a production potter with an existing market my time is best used doing the production.
I have spent my time being in front of the public with work either at shows or galleries or shops or now markets (mugs)
No matter how you approach this it will take time to get known-noways some net exposure will be part of this. My customers for the most part are not 20-30 year olds so Instagram and twitter are not my tools as they are not needed for me.

I have seen the photo on TV they are devastating, people are digging through ashes and then the poor wineries. Kansas had fires like this earlier this summer, killing thousands of livestock animals. It was caused by drought and poor management of land. We have a invasive cedar tree here that needs to be kept cleared off the land. They fill the property in no time and go up like roman candle fireworks when they catch on fire. They are trying to get landowners to clear them, I haven't seen any of that happening. Denice

The Brent yoke system is a draw back for sure-I just prefer the Brent cap system so I modified my Scott creek buy wielding the Brent taps onto the steel Scott Creek barrel and put a Brent cap on that. I also have a full Brent unit-we use them both every week The Bailey is also a great extruder as President mentioned.

Use the search function as this has been covered many times-I myself like the Brent cap system-they cost more.For hobbyists you can get a lesser brand.Scott Creeks are nice . I have one thats been modified to accept a Brent Cap-I use two extruders every week.

I'm in a quiz mode this am-I do not have this book.
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Another #4 answer is -you will need a triple beam to make this measurement but a digital scale is also a new modern version that will work as well
My guess is this is the answer that you are looking for as the book is from the 80's